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25Mhz?
- Thread starter T23
- Start date
I doubt you were hearing TV audio near 25 MHz, most likely an international broadcast station.
International Shortwave Broadcast Bands
2300-2495 kHz 120 Meters
3200-3400 kHz 90 Meters
3900-4000 kHz 75 Meters
4750-5060 kHz 60 Meters
5850-6200 kHz 49 Meters
7100-7350 kHz 41 Meters
9400-9900 kHz 31 Meters
11600-12050 kHz 25 Meters
13570-13800 kHz 22 Meters
15100-15800 kHz 19 Meters
17480-17900 kHz 16 Meters
18900-19020 kHz 15 Meters
21450-21850 kHz 13 Meters
25600-26100 kHz 11 Meters
International broadcasters and CB'ers have something in common, they both can be found outside their band limits, so you will find them above and below the band edges.
so XM repeaters and soon to be mobile broadband? why do I doubt this new mobile broadband is going to be widely implemented, could have something to do with cuban fishing boats, the us military, low budget foreign shortwave broadcasters, skywave propagation and the 11 year sunspot cycle.
Sure its possible with digital modes and FHSS, but theres just not alot of bandwidth down there and when atmospheric conditions are right that broadband is going to run slow.
Its dead air, all I ever heard in the neighboorhood of 25mhz is tones, beacons, and a scrambled sideband transmission. Once heard freebanders talking up on 26.050 once too but thats 51khz too high to be on 25 duh.
Sure its possible with digital modes and FHSS, but theres just not alot of bandwidth down there and when atmospheric conditions are right that broadband is going to run slow.
Its dead air, all I ever heard in the neighboorhood of 25mhz is tones, beacons, and a scrambled sideband transmission. Once heard freebanders talking up on 26.050 once too but thats 51khz too high to be on 25 duh.
There's not much going on in 25mhz. A few local FM stations have studio-to-tower links there. I'm in north Dixie and during really good propagation times I can hear a S. Florida FM station's link. They're on the upper end like around 25.850 and in FM. I think the few shortwave broadcasters that used to use it went elsewhere.
So in other words it's a big fatt megahurtz just sittin' there waiting for some enterprising CBer's to take it over.
So in other words it's a big fatt megahurtz just sittin' there waiting for some enterprising CBer's to take it over.
That link talks about freeing up 25 MHz worth of spectrum not freeing up the 25.0-25.999 MHz range of frequencies.
I also agree with IMD262 about the European TV.The lowest frequency used in Europe was 45.00 for video carrier and 41.50 for the audio carrier.If it was from Europe it was most likely radio broadcasts.
CK beat me to it. It's 25 MHz worth of spectrum somewhere in the UHF region, I'd guess.
Of course, the article mentions something about Sirius radio using the "2.3 MHz" range. Something tells me that should be GHz, but somebody correct me if I'm rwong. (I know.)
Never have heard reruns of one life to live or general hospital on radio.
Sounds more like a cable leak to me. Cable channels are converted and are all over the shortwave/VHF/UHF spectrum. In any event there was NEVER any TV channel assignments on 25 MHz in any area of the world. Except for one odd-ball system used in France all TV audio modulation was/is FM and wideband at that making it VERY unlikely that you could ever even detect it in your region. Even here on the east coast it is next to impossible. Video carriers are easily detected as a BUZZZZZZZZZZ but the audio carrier is almost never decoded.
In the midwest Civil Air Patrol run just below channel 1 26.855am and around there.I have heard the Coast gaurd in Missouri running on 26750fm durring the 1993 floods here...thats about it....73s de JW
